Linux + MS Proxy

I am going nuts on this one. I have an NT 4.0 box running MS-Proxy 2.0 . All of the win9x and NT boxes need the client software (of course). AFAIK, there is no Linux/Unix ports of this software. I was referred to Dante, however that has about zero documentation, and all the trick I have tried ended in failure to connect. I need the linux box to do email and web browsing as well as remote X sessions from work into my home box. If I get somewhere, Ill dish out the points. Even if I find out that it is impossible.